"Accidental" involution of the human thymus.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D008206:Lymphatic Diseases / Q000473:pathology; D010587:Phagocytosis; D013950:Thymus Gland / Q000166:cytology* / Q000473:pathology